package com.thyme.security.core.validate.code;

import com.thyme.security.core.properties.SecurityProperties;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.social.connect.web.HttpSessionSessionStrategy;
import org.springframework.social.connect.web.SessionStrategy;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;

/**
 * @author thyme
 * @ClassName ValidateCodeFilter
 * @Description TODO
 * @Date 2019/6/11 16:16
 */
public class SmsCodeFilter extends OncePerRequestFilter implements InitializingBean {

    private AuthenticationFailureHandler authenticationFailureHandler;

    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();

    private Set<String> urls = new HashSet<>();

    private SecurityProperties securityProperties;

    private AntPathMatcher pathMatcher = new AntPathMatcher();

    @Override
    public void afterPropertiesSet() throws ServletException {
        super.afterPropertiesSet();
        String[] configUrls = StringUtils.splitByWholeSeparatorPreserveAllTokens(securityProperties.getCode().getSms().getUrl(),",");
        for (String configUrl : configUrls) {
            urls.add(configUrl);
        }
        urls.add("/authentication/mobile");
    }

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
       boolean action = false;
        for (String url : urls) {
            if (pathMatcher.match(url,request.getRequestURI())){
                action = true;
            }
        }
        if (action){
            try {
                validate(new ServletWebRequest(request));
            } catch (ValidateCodeException e){
                authenticationFailureHandler.onAuthenticationFailure(request,response,e);
                return;
            }
        }
        filterChain.doFilter(request,response);
    }

    private void validate(ServletWebRequest request) throws ServletRequestBindingException {

        ValidateCode codeInSession = (ValidateCode)sessionStrategy.getAttribute(request, ValidateCodeController.SESSION_KEY);

        String codeInRequest = ServletRequestUtils.getStringParameter(request.getRequest(), "smsCode");

        if (StringUtils.isBlank(codeInRequest)){
            throw new ValidateCodeException( "验证码的值不能为空");
        }

        if (codeInSession == null ){
            throw new ValidateCodeException( "验证码不存在");
        }

        if (codeInSession.isExpried()){
            sessionStrategy.removeAttribute(request,ValidateCodeController.SESSION_KEY);
            throw new ValidateCodeException( "验证码已过期");
        }

        if (!StringUtils.equals(codeInSession.getCode(),codeInRequest)){
            throw new ValidateCodeException( "验证码不匹配");
        }

        sessionStrategy.removeAttribute(request,ValidateCodeController.SESSION_KEY);
    }

    public AuthenticationFailureHandler getAuthenticationFailureHandler() {
        return authenticationFailureHandler;
    }

    public void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
        this.authenticationFailureHandler = authenticationFailureHandler;
    }

    public SessionStrategy getSessionStrategy() {
        return sessionStrategy;
    }

    public void setSessionStrategy(SessionStrategy sessionStrategy) {
        this.sessionStrategy = sessionStrategy;
    }

    public SecurityProperties getSecurityProperties() {
        return securityProperties;
    }

    public void setSecurityProperties(SecurityProperties securityProperties) {
        this.securityProperties = securityProperties;
    }
}
